dis·an·nul 
(dĭs′ə-nŭl)
(dĭs′ə-nŭl)tr.v. dis·an·nulled, dis·an·null·ing, dis·an·nuls
To annul or cancel.
dis′an·nulment n.
- photocoagulation
- photocompose
- photocomposition
- photoconduction
- photoconductive
- photoconductivity
- photocopier
- photocopy
- photocurrent
- photodecomposition
- photodegradable
- photodiode
- photodisintegration
- photoduplicate
- photoduplication
- photodynamic
- photodynamically
- photodynamics
- photodynamic therapy
- photoelectric
- photoelectrical
- photoelectrically
- photoelectric cell
- photoelectric effect
- photoelectron